The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Jean François Briois - One of the best experts on this subject based on the ideXlab platform.
-
End-group modification of poly(2,6-dimethyl-1,4-phenylene ether) and in situ synthesis of poly(2,6-dimethyl-1,4-phenylene ether)-b-Poly(Ethylene Terephthalate) block copolymer
Journal of Polymer Science Part A: Polymer Chemistry, 2008Co-Authors: Stéphane Jéol, Alain Rousseau, Françoise Fenouillot, Christiane Monnet, Karine Masenelli-varlot, Jean François BrioisAbstract:The preparation of poly(2,6-dimethyl-1,4-phenylene ether)-b-poly(Ethylene Terephthalate) block copolymer was performed by the reaction of the 2-hydroxyethyl modified poly(2,6-dimethyl-1,4-phenylene ether) (PPE-EtOH) with poly(Ethylene Terephthalate) (PET) by an in situ process, during the synthesis of the polyester. The yield of the reaction of the 2-hydroxyethyl functionalized PPE-EtOH with PET was close to 100%. A significant proportion of the PET-b-PPE-EtOH block copolymer was found to have short PET block. Nevertheless, the copolymer structured in the shape of micelles (20 nm diameter) and very small domains with 50-200 nm diameter, whereas unmodified PPE formed much larger domains (1.5 m) containing copolymer.
Stéphane Jéol - One of the best experts on this subject based on the ideXlab platform.
-
End-group modification of poly(2,6-dimethyl-1,4-phenylene ether) and in situ synthesis of poly(2,6-dimethyl-1,4-phenylene ether)-b-Poly(Ethylene Terephthalate) block copolymer
Journal of Polymer Science Part A: Polymer Chemistry, 2008Co-Authors: Stéphane Jéol, Alain Rousseau, Françoise Fenouillot, Christiane Monnet, Karine Masenelli-varlot, Jean François BrioisAbstract:The preparation of poly(2,6-dimethyl-1,4-phenylene ether)-b-poly(Ethylene Terephthalate) block copolymer was performed by the reaction of the 2-hydroxyethyl modified poly(2,6-dimethyl-1,4-phenylene ether) (PPE-EtOH) with poly(Ethylene Terephthalate) (PET) by an in situ process, during the synthesis of the polyester. The yield of the reaction of the 2-hydroxyethyl functionalized PPE-EtOH with PET was close to 100%. A significant proportion of the PET-b-PPE-EtOH block copolymer was found to have short PET block. Nevertheless, the copolymer structured in the shape of micelles (20 nm diameter) and very small domains with 50-200 nm diameter, whereas unmodified PPE formed much larger domains (1.5 m) containing copolymer.
Alain Rousseau - One of the best experts on this subject based on the ideXlab platform.
-
Efficiency Increase of Poly(Ethylene Terephthalate-co-isosorbide Terephthalate) Synthesis using Bimetallic Catalytic Systems
Macromolecular Chemistry and Physics, 2011Co-Authors: Jean-christophe Bersot, Nicolas Jacquel, René Saint-loup, Patrick Fuertes, Alain Rousseau, Jean-pierre Pascault, Roger Spitz, Françoise Fenouillot, Vincent MonteilAbstract:New catalytic systems are developed to increase the transesterification efficiency during the synthesis of poly(Ethylene Terephthalate-co-isosorbide Terephthalate) with the aim of compensating for the lack of reactivity of the isosorbide and to reduce the coloration of the polymer. The combination of antimony oxide with a second metal (lithium-, magnesium-, or aluminium-based compounds) is investigated, leading to the discovery of innovative antimony-based bimetallic catalytic systems that exhibit a higher polymerization efficiency, even at high isosorbide contents (20%) and, in some cases, lower coloration.
-
End-group modification of poly(2,6-dimethyl-1,4-phenylene ether) and in situ synthesis of poly(2,6-dimethyl-1,4-phenylene ether)-b-Poly(Ethylene Terephthalate) block copolymer
Journal of Polymer Science Part A: Polymer Chemistry, 2008Co-Authors: Stéphane Jéol, Alain Rousseau, Françoise Fenouillot, Christiane Monnet, Karine Masenelli-varlot, Jean François BrioisAbstract:The preparation of poly(2,6-dimethyl-1,4-phenylene ether)-b-poly(Ethylene Terephthalate) block copolymer was performed by the reaction of the 2-hydroxyethyl modified poly(2,6-dimethyl-1,4-phenylene ether) (PPE-EtOH) with poly(Ethylene Terephthalate) (PET) by an in situ process, during the synthesis of the polyester. The yield of the reaction of the 2-hydroxyethyl functionalized PPE-EtOH with PET was close to 100%. A significant proportion of the PET-b-PPE-EtOH block copolymer was found to have short PET block. Nevertheless, the copolymer structured in the shape of micelles (20 nm diameter) and very small domains with 50-200 nm diameter, whereas unmodified PPE formed much larger domains (1.5 m) containing copolymer.
Françoise Fenouillot - One of the best experts on this subject based on the ideXlab platform.
-
Efficiency Increase of Poly(Ethylene Terephthalate-co-isosorbide Terephthalate) Synthesis using Bimetallic Catalytic Systems
Macromolecular Chemistry and Physics, 2011Co-Authors: Jean-christophe Bersot, Nicolas Jacquel, René Saint-loup, Patrick Fuertes, Alain Rousseau, Jean-pierre Pascault, Roger Spitz, Françoise Fenouillot, Vincent MonteilAbstract:New catalytic systems are developed to increase the transesterification efficiency during the synthesis of poly(Ethylene Terephthalate-co-isosorbide Terephthalate) with the aim of compensating for the lack of reactivity of the isosorbide and to reduce the coloration of the polymer. The combination of antimony oxide with a second metal (lithium-, magnesium-, or aluminium-based compounds) is investigated, leading to the discovery of innovative antimony-based bimetallic catalytic systems that exhibit a higher polymerization efficiency, even at high isosorbide contents (20%) and, in some cases, lower coloration.
-
End-group modification of poly(2,6-dimethyl-1,4-phenylene ether) and in situ synthesis of poly(2,6-dimethyl-1,4-phenylene ether)-b-Poly(Ethylene Terephthalate) block copolymer
Journal of Polymer Science Part A: Polymer Chemistry, 2008Co-Authors: Stéphane Jéol, Alain Rousseau, Françoise Fenouillot, Christiane Monnet, Karine Masenelli-varlot, Jean François BrioisAbstract:The preparation of poly(2,6-dimethyl-1,4-phenylene ether)-b-poly(Ethylene Terephthalate) block copolymer was performed by the reaction of the 2-hydroxyethyl modified poly(2,6-dimethyl-1,4-phenylene ether) (PPE-EtOH) with poly(Ethylene Terephthalate) (PET) by an in situ process, during the synthesis of the polyester. The yield of the reaction of the 2-hydroxyethyl functionalized PPE-EtOH with PET was close to 100%. A significant proportion of the PET-b-PPE-EtOH block copolymer was found to have short PET block. Nevertheless, the copolymer structured in the shape of micelles (20 nm diameter) and very small domains with 50-200 nm diameter, whereas unmodified PPE formed much larger domains (1.5 m) containing copolymer.
Christiane Monnet - One of the best experts on this subject based on the ideXlab platform.
-
End-group modification of poly(2,6-dimethyl-1,4-phenylene ether) and in situ synthesis of poly(2,6-dimethyl-1,4-phenylene ether)-b-Poly(Ethylene Terephthalate) block copolymer
Journal of Polymer Science Part A: Polymer Chemistry, 2008Co-Authors: Stéphane Jéol, Alain Rousseau, Françoise Fenouillot, Christiane Monnet, Karine Masenelli-varlot, Jean François BrioisAbstract:The preparation of poly(2,6-dimethyl-1,4-phenylene ether)-b-poly(Ethylene Terephthalate) block copolymer was performed by the reaction of the 2-hydroxyethyl modified poly(2,6-dimethyl-1,4-phenylene ether) (PPE-EtOH) with poly(Ethylene Terephthalate) (PET) by an in situ process, during the synthesis of the polyester. The yield of the reaction of the 2-hydroxyethyl functionalized PPE-EtOH with PET was close to 100%. A significant proportion of the PET-b-PPE-EtOH block copolymer was found to have short PET block. Nevertheless, the copolymer structured in the shape of micelles (20 nm diameter) and very small domains with 50-200 nm diameter, whereas unmodified PPE formed much larger domains (1.5 m) containing copolymer.